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. 2007 Jan-Mar;41(1):23–26. doi: 10.4103/0019-5413.30521

Table 3.

Types of clinical study designs

  1. Therapeutic study

    1. Randomized controlled trial

    2. Cohort study

    3. Case-control study

    4. Case series

  2. Observational study (prognostic)

    1. Prospective

    2. Retrospective

  3. Diagnostic study

    1. Testing previously developed diagnostic criteria

    2. Developing new diagnostic criteria

  4. Economic and decision analysis